Android屏幕截图并保存截取屏幕的图片到指定文件，具体内容如下
注意要添加权限：
代码语言：javascript复制<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" / 完整代码：
代码语言：javascript复制package zhangphil.test;
import android.app.Activity;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.os.Environment;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.util.DisplayMetrics;
import android.view.View;
import android.widget.Toast;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
public class JavaActivity extends AppCompatActivity {
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.drawable_activity);
AppCompatActivity activity = this;
findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "zhangphil.jpg");
Bitmap bitmap = screenShot(activity);
try {
if (!file.exists())
file.createNewFile();
boolean ret = save(bitmap, file, Bitmap.CompressFormat.JPEG, true);
if (ret) {
Toast.makeText(getApplicationContext(), "截图已保持至 " file.getAbsolutePath(), Toast.LENGTH_SHORT).show();
}
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* 保存图片到文件File。
*
* @param src 源图片
* @param file 要保存到的文件
* @param format 格式
* @param recycle 是否回收
* @return true 成功 false 失败
*/
public static boolean save(Bitmap src, File file, Bitmap.CompressFormat format, boolean recycle) {
if (isEmptyBitmap(src))
return false;
OutputStream os;
boolean ret = false;
try {
os = new BufferedOutputStream(new FileOutputStream(file));
ret = src.compress(format, 100, os);
if (recycle && !src.isRecycled())
src.recycle();
} catch (IOException e) {
e.printStackTrace();
}
return ret;
}
/**
* 获取当前屏幕截图，不包含状态栏（Status Bar）。
*
* @param activity activity
* @return Bitmap
*/
public static Bitmap screenShot(Activity activity) {
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap bmp = view.getDrawingCache();
int statusBarHeight = getStatusBarHeight(activity);
int width = (int) getDeviceDisplaySize(activity)[0];
int height = (int) getDeviceDisplaySize(activity)[1];
Bitmap ret = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height - statusBarHeight);
view.destroyDrawingCache();
return ret;
}
public static float[] getDeviceDisplaySize(Context context) {
Resources resources = context.getResources();
DisplayMetrics dm = resources.getDisplayMetrics();
int width = dm.widthPixels;
int height = dm.heightPixels;
float[] size = new float[2];
size[0] = width;
size[1] = height;
return size;
}
public static int getStatusBarHeight(Context context) {
int height = 0;
int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");
if (resourceId 0) {
height = context.getResources().getDimensionPixelSize(resourceId);
}
return height;
}
/**
* Bitmap对象是否为空。
*/
public static boolean isEmptyBitmap(Bitmap src) {
return src == null || src.getWidth() == 0 || src.getHeight() == 0;
}
}以上就是本文的全部内容，希望对大家的学习有所帮助。
