本文实例为大家分享了android实现手机截屏并保存截图功能的具体代码，供大家参考，具体内容如下
一、准备一张图片
拷贝screenshot_panel.9.png放在目录drawable-xhdpi下
二、activity_main.xml
代码如下：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/hello_world" /> <Button android:id="@+id/main_btn" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Shot" android:layout_alignParentBottom="true"/> </RelativeLayout>
三、新建xml文件
<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <ImageView android:id="@+id/global_screenshot_background" android:layout_width="match_parent" android:layout_height="match_parent" android:src="@android:color/black" android:visibility="gone" /> <ImageView android:id="@+id/global_screenshot" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:background="@drawable/screenshot_panel" android:visibility="gone" android:adjustViewBounds="true" /> <ImageView android:id="@+id/global_screenshot_flash" android:layout_width="match_parent" android:layout_height="match_parent" android:src="@android:color/white" android:visibility="gone" /></FrameLayout>
四、在dimens.xml添加一项
<dimen name="global_screenshot_bg_padding">20dp</dimen>
五、后台代码
1）SurfaceControl.java
import android.graphics.Bitmap;import android.view.View; public class SurfaceControl { public static Bitmap screenshot(View view) { view.setDrawingCacheEnabled(true); view.buildDrawingCache(); Bitmap bmp = view.getDrawingCache(); return bmp; }}
2）GlobalScreenShot.java代码如下，其中SavePicture方法有保存截图的路径
import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Locale; import android.animation.Animator;import android.animation.AnimatorListenerAdapter;import android.animation.AnimatorSet;import android.animation.ValueAnimator;import android.animation.ValueAnimator.AnimatorUpdateListener;import android.content.Context;import android.content.res.Resources;import android.graphics.Bitmap;import android.graphics.Matrix;import android.graphics.PixelFormat;import android.graphics.PointF;import android.media.MediaActionSound;import android.net.Uri;import android.os.Environment;import android.util.DisplayMetrics;import android.util.Log;import android.view.Display;import android.view.LayoutInflater;import android.view.MotionEvent;import android.view.View;import android.view.ViewGroup;import android.view.WindowManager;import android.view.animation.Interpolator;import android.widget.ImageView;import android.widget.Toast; /** * POD used in the AsyncTask which saves an image in the background. */class SaveImageInBackgroundData { Context context; Bitmap image; Uri imageUri; Runnable finisher; int iconSize; int result; void clearImage() { image = null; imageUri = null; iconSize = 0; } void clearContext() { context = null; }} /** * TODO: * - Performance when over gl surfaces? Ie. Gallery * - what do we say in the Toast? Which icon do we get if the user uses another * type of gallery? */class GlobalScreenshot { private static final String TAG = "GlobalScreenshot"; private static final int SCREENSHOT_FLASH_TO_PEAK_DURATION = 130; private static final int SCREENSHOT_DROP_IN_DURATION = 430; private static final int SCREENSHOT_DROP_OUT_DELAY = 500; private static final int SCREENSHOT_DROP_OUT_DURATION = 430; private static final int SCREENSHOT_DROP_OUT_SCALE_DURATION = 370; private static final int SCREENSHOT_FAST_DROP_OUT_DURATION = 320; private static final float BACKGROUND_ALPHA = 0.5f; private static final float SCREENSHOT_SCALE = 1f; private static final float SCREENSHOT_DROP_IN_MIN_SCALE = SCREENSHOT_SCALE * 0.725f; private static final float SCREENSHOT_DROP_OUT_MIN_SCALE = SCREENSHOT_SCALE * 0.45f; private static final float SCREENSHOT_FAST_DROP_OUT_MIN_SCALE = SCREENSHOT_SCALE * 0.6f; private static final float SCREENSHOT_DROP_OUT_MIN_SCALE_OFFSET = 0f; private Context mContext; private WindowManager mWindowManager; private WindowManager.LayoutParams mWindowLayoutParams; private Display mDisplay; private DisplayMetrics mDisplayMetrics; private Bitmap mScreenBitmap; private View mScreenshotLayout; private ImageView mBackgroundView; private ImageView mScreenshotView; private ImageView mScreenshotFlash; private AnimatorSet mScreenshotAnimation; private float mBgPadding; private float mBgPaddingScale; private MediaActionSound mCameraSound; /** * @param context everything needs a context :( */ public GlobalScreenshot(Context context) { Resources r = context.getResources(); mContext = context; LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); // Inflate the screenshot layout mScreenshotLayout = layoutInflater.inflate(R.layout.global_screenshot, null); mBackgroundView = (ImageView) mScreenshotLayout.findViewById(R.id.global_screenshot_background); mScreenshotView = (ImageView) mScreenshotLayout.findViewById(R.id.global_screenshot); mScreenshotFlash = (ImageView) mScreenshotLayout.findViewById(R.id.global_screenshot_flash); mScreenshotLayout.setFocusable(true); mScreenshotLayout.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { // Intercept and ignore all touch events return true; } }); // Setup the window that we are going to use mWindowLayoutParams = new WindowManager.LayoutParams( ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT, 0, 0, WindowManager.LayoutParams.TYPE_SYSTEM_ALERT, WindowManager.LayoutParams.FLAG_FULLSCREEN | WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN | WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED, PixelFormat.TRANSLUCENT); mWindowLayoutParams.setTitle("ScreenshotAnimation"); mWindowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); mDisplay = mWindowManager.getDefaultDisplay(); mDisplayMetrics = new DisplayMetrics(); mDisplay.getRealMetrics(mDisplayMetrics); // Scale has to account for both sides of the bg mBgPadding = (float) r.getDimensionPixelSize(R.dimen.global_screenshot_bg_padding); mBgPaddingScale = mBgPadding / mDisplayMetrics.widthPixels; // Setup the Camera shutter sound mCameraSound = new MediaActionSound(); mCameraSound.load(MediaActionSound.SHUTTER_CLICK); } /** * Takes a screenshot of the current display and shows an animation. */ void takeScreenshot(View view, Runnable finisher, boolean statusBarVisible, boolean navBarVisible) { // Take the screenshot Log.d("debug","takeScreenshot start"); mScreenBitmap = SurfaceControl.screenshot(view); Log.d("debug","takeScreenshot 1"); if (mScreenBitmap == null) { notifyScreenshotError(mContext); finisher.run(); return; } // Optimizations mScreenBitmap.setHasAlpha(false); mScreenBitmap.prepareToDraw(); Log.d("debug","takeScreenshot 2"); Log.d("debug","takeScreenshot 3"); // Start the post-screenshot animation startAnimation(finisher, mDisplayMetrics.widthPixels, mDisplayMetrics.heightPixels, statusBarVisible, navBarVisible); Log.d("debug","takeScreenshot end"); } private void SavePicture(){ Log.d("debug","SavePicture 1"); mScreenshotView.setDrawingCacheEnabled(true); Log.d("debug","SavePicture 2"); Bitmap obmp = Bitmap.createBitmap(mScreenshotView.getDrawingCache()); Log.d("debug","SavePicture 3"); if (obmp != null) { // 图片存储路径 String SavePath = getSDCardPath() + "/test/ScreenImages"; // 保存Bitmap Log.d("debug","SavePath = "+SavePath); try { File path = new File(SavePath); // 文件 String filepath = SavePath + "/Screen_1.png"; Log.d("debug","filepath = "+filepath); File file = new File(filepath); if (!path.exists()) { Log.d("debug","path is not exists"); path.mkdirs(); } if (!file.exists()) { Log.d("debug","file create new "); file.createNewFile(); } FileOutputStream fos = null; fos = new FileOutputStream(file); if (null != fos) { obmp.compress(Bitmap.CompressFormat.PNG, 90, fos); fos.flush(); fos.close(); Log.d("debug","save ok"); } } catch (Exception e) { e.printStackTrace(); } } } /** * 获取SDCard的目录路径功能 * * @return */ private String getSDCardPath() { File sdcardDir = null; // 判断SDCard是否存在 boolean sdcardExist = Environment.getExternalStorageState().equals( android.os.Environment.MEDIA_MOUNTED); if (sdcardExist) { sdcardDir = Environment.getExternalStorageDirectory(); } return sdcardDir.toString(); } /** * Starts the animation after taking the screenshot */ private void startAnimation(final Runnable finisher, int w, int h, boolean statusBarVisible, boolean navBarVisible) { // Add the view for the animation mScreenshotView.setImageBitmap(mScreenBitmap); mScreenshotLayout.requestFocus(); // Setup the animation with the screenshot just taken if (mScreenshotAnimation != null) { mScreenshotAnimation.end(); mScreenshotAnimation.removeAllListeners(); } mWindowManager.addView(mScreenshotLayout, mWindowLayoutParams); ValueAnimator screenshotDropInAnim = createScreenshotDropInAnimation(); ValueAnimator screenshotFadeOutAnim = createScreenshotDropOutAnimation(w, h, statusBarVisible, navBarVisible); mScreenshotAnimation = new AnimatorSet(); mScreenshotAnimation.playSequentially(screenshotDropInAnim, screenshotFadeOutAnim); mScreenshotAnimation.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { // Save the screenshot once we have a bit of time now saveScreenshotInWorkerThread(finisher); mWindowManager.removeView(mScreenshotLayout); SavePicture(); // Clear any references to the bitmap mScreenBitmap = null; mScreenshotView.setImageBitmap(null); } }); mScreenshotLayout.post(new Runnable() { @Override public void run() { // Play the shutter sound to notify that we've taken a screenshot mCameraSound.play(MediaActionSound.SHUTTER_CLICK); mScreenshotView.setLayerType(View.LAYER_TYPE_HARDWARE, null); mScreenshotView.buildLayer(); mScreenshotAnimation.start(); } }); } private ValueAnimator createScreenshotDropInAnimation() { final float flashPeakDurationPct = ((float) (SCREENSHOT_FLASH_TO_PEAK_DURATION) / SCREENSHOT_DROP_IN_DURATION); final float flashDurationPct = 2f * flashPeakDurationPct; final Interpolator flashAlphaInterpolator = new Interpolator() { @Override public float getInterpolation(float x) { // Flash the flash view in and out quickly if (x <= flashDurationPct) { return (float) Math.sin(Math.PI * (x / flashDurationPct)); } return 0; } }; final Interpolator scaleInterpolator = new Interpolator() { @Override public float getInterpolation(float x) { // We start scaling when the flash is at it's peak if (x < flashPeakDurationPct) { return 0; } return (x - flashDurationPct) / (1f - flashDurationPct); } }; ValueAnimator anim = ValueAnimator.ofFloat(0f, 1f); anim.setDuration(SCREENSHOT_DROP_IN_DURATION); anim.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationStart(Animator animation) { mBackgroundView.setAlpha(0f); mBackgroundView.setVisibility(View.VISIBLE); mScreenshotView.setAlpha(0f); mScreenshotView.setTranslationX(0f); mScreenshotView.setTranslationY(0f); mScreenshotView.setScaleX(SCREENSHOT_SCALE + mBgPaddingScale); mScreenshotView.setScaleY(SCREENSHOT_SCALE + mBgPaddingScale); mScreenshotView.setVisibility(View.VISIBLE); mScreenshotFlash.setAlpha(0f); mScreenshotFlash.setVisibility(View.VISIBLE); } @Override public void onAnimationEnd(android.animation.Animator animation) { mScreenshotFlash.setVisibility(View.GONE); } }); anim.addUpdateListener(new AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animation) { float t = (Float) animation.getAnimatedValue(); float scaleT = (SCREENSHOT_SCALE + mBgPaddingScale) - scaleInterpolator.getInterpolation(t) * (SCREENSHOT_SCALE - SCREENSHOT_DROP_IN_MIN_SCALE); mBackgroundView.setAlpha(scaleInterpolator.getInterpolation(t) * BACKGROUND_ALPHA); mScreenshotView.setAlpha(t); mScreenshotView.setScaleX(scaleT); mScreenshotView.setScaleY(scaleT); mScreenshotFlash.setAlpha(flashAlphaInterpolator.getInterpolation(t)); } }); return anim; } private ValueAnimator createScreenshotDropOutAnimation(int w, int h, boolean statusBarVisible, boolean navBarVisible) { ValueAnimator anim = ValueAnimator.ofFloat(0f, 1f); anim.setStartDelay(SCREENSHOT_DROP_OUT_DELAY); anim.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { mBackgroundView.setVisibility(View.GONE); mScreenshotView.setVisibility(View.GONE); mScreenshotView.setLayerType(View.LAYER_TYPE_NONE, null); } }); if (!statusBarVisible || !navBarVisible) { // There is no status bar/nav bar, so just fade the screenshot away in place anim.setDuration(SCREENSHOT_FAST_DROP_OUT_DURATION); anim.addUpdateListener(new AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animation) { float t = (Float) animation.getAnimatedValue(); float scaleT = (SCREENSHOT_DROP_IN_MIN_SCALE + mBgPaddingScale) - t * (SCREENSHOT_DROP_IN_MIN_SCALE - SCREENSHOT_FAST_DROP_OUT_MIN_SCALE); mBackgroundView.setAlpha((1f - t) * BACKGROUND_ALPHA); mScreenshotView.setAlpha(1f - t); mScreenshotView.setScaleX(scaleT); mScreenshotView.setScaleY(scaleT); } }); } else { // In the case where there is a status bar, animate to the origin of the bar (top-left) final float scaleDurationPct = (float) SCREENSHOT_DROP_OUT_SCALE_DURATION / SCREENSHOT_DROP_OUT_DURATION; final Interpolator scaleInterpolator = new Interpolator() { @Override public float getInterpolation(float x) { if (x < scaleDurationPct) { // Decelerate, and scale the input accordingly return (float) (1f - Math.pow(1f - (x / scaleDurationPct), 2f)); } return 1f; } }; // Determine the bounds of how to scale float halfScreenWidth = (w - 2f * mBgPadding) / 2f; float halfScreenHeight = (h - 2f * mBgPadding) / 2f; final float offsetPct = SCREENSHOT_DROP_OUT_MIN_SCALE_OFFSET; final PointF finalPos = new PointF( -halfScreenWidth + (SCREENSHOT_DROP_OUT_MIN_SCALE + offsetPct) * halfScreenWidth, -halfScreenHeight + (SCREENSHOT_DROP_OUT_MIN_SCALE + offsetPct) * halfScreenHeight); // Animate the screenshot to the status bar anim.setDuration(SCREENSHOT_DROP_OUT_DURATION); anim.addUpdateListener(new AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animation) { float t = (Float) animation.getAnimatedValue(); float scaleT = (SCREENSHOT_DROP_IN_MIN_SCALE + mBgPaddingScale) - scaleInterpolator.getInterpolation(t) * (SCREENSHOT_DROP_IN_MIN_SCALE - SCREENSHOT_DROP_OUT_MIN_SCALE); mBackgroundView.setAlpha((1f - t) * BACKGROUND_ALPHA); mScreenshotView.setAlpha(1f - scaleInterpolator.getInterpolation(t)); mScreenshotView.setScaleX(scaleT); mScreenshotView.setScaleY(scaleT); mScreenshotView.setTranslationX(t * finalPos.x); mScreenshotView.setTranslationY(t * finalPos.y); } }); } return anim; } private void notifyScreenshotError(Context context) { } private void saveScreenshotInWorkerThread(Runnable runnable) { }}
3）在MainActivity.java调用
import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.view.MenuItem;import android.view.View; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); final GlobalScreenshot screenshot = new GlobalScreenshot(this); findViewById(R.id.main_btn).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { screenshot.takeScreenshot(getWindow().getDecorView(), new Runnable() { @Override public void run() { } }, true, true); } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } }
六、AndroidManifest.xml设置权限
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"></uses-permission><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
