前言：基于RxPaparazzo的图片裁剪，图片旋转、比例放大|缩小。

效果：

开发环境：AndroidStudio2.2.1+gradle-2.14.1

涉及知识：

1.Material Design

（CardView+CoordinatorLayout+AppBarLayout+NestedScrollView+CollapsingToolbarLayout+Toolbar+FloatingActionButton）使用

2.butterknife注解式开发

3.基于RxJava+RxAndroid的RxPaparazzo使用

引入依赖：

compile 'com.android.support:appcompat-v7:24.+' //RxPaparazzo 拍照&相册// compile "com.github.miguelbcr:RxPaparazzo:0.4.2-2.x" compile ("com.github.miguelbcr:RxPaparazzo:0.5.2-2.x") { exclude module: 'okhttp' exclude module: 'okio' } compile 'io.reactivex.rxjava2:rxandroid:2.0.1' compile 'com.android.support:cardview-v7:24.+'// compile 'com.android.support:customtabs:24.+' compile 'com.android.support:design:24.+' compile 'com.jakewharton:butterknife:7.0.1'

部分代码：

public class MainActivity extends AppCompatActivity { @Bind(R.id.iv_appbar) ImageView iv_appbar; @Bind(R.id.main_toolbar) Toolbar toolbar; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ButterKnife.bind(this); initToolBar(); } private void initToolBar() { this.setSupportActionBar(toolbar); toolbar.setTitle("我的"); } @OnClick({R.id.main_toolbar, R.id.btn_float}) public void onClick(View view) { final UCrop.Options options = new UCrop.Options(); int color = ContextCompat.getColor(view.getContext(), R.color.colorPrimary); options.setToolbarColor(color); options.setStatusBarColor(ContextCompat.getColor(view.getContext(), R.color.colorPrimaryDark)); options.setActiveWidgetColor(color); switch (view.getId()) { case R.id.main_toolbar: Toast.makeText(MainActivity.this, "Toolbar点击", Toast.LENGTH_SHORT).show(); break; case R.id.btn_float: { showDialog(view, options); break; } } } private void showDialog(View view, final UCrop.Options options) { final Context context = view.getContext(); final AlertDialog.Builder builder = new AlertDialog.Builder(context); builder.setTitle("设置背景图片：").setMessage("如何获取图片？") .setPositiveButton("相册", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss();// RxPaparazzo.takeImage(MainActivity.this) RxPaparazzo.single(MainActivity.this) .crop(options) .usingGallery() .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe(new Consumer<Response<MainActivity, FileData>>() { @Override public void accept(Response<MainActivity, FileData> response) throws Exception { if (response.resultCode() == Activity.RESULT_OK) { File filePath = response.data().getFile(); Bitmap bitmap = BitmapFactory. decodeFile(filePath.getPath()); iv_appbar.setImageBitmap(bitmap); } else if (response.resultCode() == Activity.RESULT_CANCELED) { Toast.makeText(MainActivity.this, "取消相册访问", Toast.LENGTH_SHORT).show(); } else { Toast.makeText(MainActivity.this, "未知错误！", Toast.LENGTH_SHORT).show(); } } }); } }) .setNeutralButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }) .setNegativeButton("拍照", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss();// RxPaparazzo.takeImage(MainActivity.this) RxPaparazzo.single(MainActivity.this) .crop(options) .usingCamera() .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe(new Consumer<Response<MainActivity, FileData>>() { @Override public void accept(Response<MainActivity, FileData> response) throws Exception { if (response.resultCode() == Activity.RESULT_OK) { FileData filePath = response.data(); Bitmap bitmap = BitmapFactory. decodeFile(filePath.getFile().getPath()); iv_appbar.setImageBitmap(bitmap); } else if (response.resultCode() == Activity.RESULT_CANCELED) { Toast.makeText(MainActivity.this, "取消拍照", Toast.LENGTH_SHORT).show(); } else { Toast.makeText(MainActivity.this, "未知错误！", Toast.LENGTH_SHORT).show(); } } }); /** * new Consumer<Response<MainActivity, String>>() { @Override public void accept(@NonNull Response<MainActivity, String> response) throws Exception { if (response.resultCode() == Activity.RESULT_OK) { String filePath = response.data(); Bitmap bitmap = BitmapFactory.decodeFile(filePath); iv_appbar.setImageBitmap(bitmap); } else if (response.resultCode() == Activity.RESULT_CANCELED) { Toast.makeText(MainActivity.this, "取消拍照", Toast.LENGTH_SHORT).show(); } else { Toast.makeText(MainActivity.this, "未知错误！", Toast.LENGTH_SHORT).show(); } } } * */ } }); AlertDialog dialog = builder.create(); dialog.show(); dialog.getButton(DialogInterface.BUTTON_POSITIVE). setTextColor(ContextCompat.getColor(context, R.color.colorPrimary) ); dialog.getButton(DialogInterface.BUTTON_NEGATIVE). setTextColor(ContextCompat.getColor(context, R.color.colorPrimary) ); dialog.getButton(DialogInterface.BUTTON_NEUTRAL). setTextColor(ContextCompat.getColor(context, R.color.colorAccent) ); } @Override protected void onDestroy() { super.onDestroy(); ButterKnife.unbind(this);//解除绑定 }}

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