google 给出一个截屏录屏的方法5.0以上 需要onActivityResult()里的intent参数

1、startActivityForResult(mMediaProjectionManager.createScreenCaptureIntent(),REQUEST_MEDIA_PROJECTION);

2、在onActivityResult里的

setUpMediaProjection();

setUpVirtualDisplay();

/*

* Copyright (C) 2014 The Android Open Source Project

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

package com.example.android.screencapture;

import android.app.Activity;

import android.content.Context;

import android.content.Intent;

import android.hardware.display.DisplayManager;

import android.hardware.display.VirtualDisplay;

import android.media.projection.MediaProjection;

import android.media.projection.MediaProjectionManager;

import android.os.Bundle;

import android.support.annotation.Nullable;

import android.support.v4.app.Fragment;

import android.util.DisplayMetrics;

import android.view.LayoutInflater;

import android.view.Surface;

import android.view.SurfaceView;

import android.view.View;

import android.view.ViewGroup;

import android.widget.Button;

import android.widget.Toast;

import com.example.android.common.logger.Log;

/**

* Provides UI for the screen capture.

*/

public class ScreenCaptureFragment extends Fragment implements View.OnClickListener {

private static final String TAG = "ScreenCaptureFragment";

private static final String STATE_RESULT_CODE = "result_code";

private static final String STATE_RESULT_DATA = "result_data";

private static final int REQUEST_MEDIA_PROJECTION = 1;

private int mScreenDensity;

private int mResultCode;

private Intent mResultData;

private Surface mSurface;

private MediaProjection mMediaProjection;

private VirtualDisplay mVirtualDisplay;

private MediaProjectionManager mMediaProjectionManager;

private Button mButtonToggle;

private SurfaceView mSurfaceView;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

if (savedInstanceState != null) {

mResultCode = savedInstanceState.getInt(STATE_RESULT_CODE);

mResultData = savedInstanceState.getParcelable(STATE_RESULT_DATA);

}

}

@Nullable

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

return inflater.inflate(R.layout.fragment_screen_capture, container, false);

}

@Override

public void onViewCreated(View view, Bundle savedInstanceState) {

mSurfaceView = (SurfaceView) view.findViewById(R.id.surface);

mSurface = mSurfaceView.getHolder().getSurface();

mButtonToggle = (Button) view.findViewById(R.id.toggle);

mButtonToggle.setOnClickListener(this);

}

@Override

public void onActivityCreated(Bundle savedInstanceState) {

super.onActivityCreated(savedInstanceState);

Activity activity = getActivity();

DisplayMetrics metrics = new DisplayMetrics();

activity.getWindowManager().getDefaultDisplay().getMetrics(metrics);

mScreenDensity = metrics.densityDpi;

mMediaProjectionManager = (MediaProjectionManager)

activity.getSystemService(Context.MEDIA_PROJECTION_SERVICE);

}

@Override

public void onSaveInstanceState(Bundle outState) {

super.onSaveInstanceState(outState);

if (mResultData != null) {

outState.putInt(STATE_RESULT_CODE, mResultCode);

outState.putParcelable(STATE_RESULT_DATA, mResultData);

}

}

@Override

public void onClick(View v) {

switch (v.getId()) {

case R.id.toggle:

if (mVirtualDisplay == null) {

startScreenCapture();

} else {

stopScreenCapture();

}

break;

}

}

@Override

public void onActivityResult(int requestCode, int resultCode, Intent data) {

if (requestCode == REQUEST_MEDIA_PROJECTION) {

if (resultCode != Activity.RESULT_OK) {

Log.i(TAG, "User cancelled");

Toast.makeText(getActivity(), R.string.user_cancelled, Toast.LENGTH_SHORT).show();

return;

}

Activity activity = getActivity();

if (activity == null) {

return;

}

Log.i(TAG, "Starting screen capture");

mResultCode = resultCode;

mResultData = data;

setUpMediaProjection();

setUpVirtualDisplay();

}

}

@Override

public void onPause() {

super.onPause();

stopScreenCapture();

}

@Override

public void onDestroy() {

super.onDestroy();

tearDownMediaProjection();

}

private void setUpMediaProjection() {

mMediaProjection = mMediaProjectionManager.getMediaProjection(mResultCode, mResultData);

}

private void tearDownMediaProjection() {

if (mMediaProjection != null) {

mMediaProjection.stop();

mMediaProjection = null;

}

}

private void startScreenCapture() {

Activity activity = getActivity();

if (mSurface == null || activity == null) {

return;

}

if (mMediaProjection != null) {

setUpVirtualDisplay();

} else if (mResultCode != 0 && mResultData != null) {

setUpMediaProjection();

setUpVirtualDisplay();

} else {

Log.i(TAG, "Requesting confirmation");

// This initiates a prompt dialog for the user to confirm screen projection.

startActivityForResult(

mMediaProjectionManager.createScreenCaptureIntent(),

REQUEST_MEDIA_PROJECTION);

}

}

private void setUpVirtualDisplay() {

Log.i(TAG, "Setting up a VirtualDisplay: " +

mSurfaceView.getWidth() + "x" + mSurfaceView.getHeight() +

" (" + mScreenDensity + ")");

mVirtualDisplay = mMediaProjection.createVirtualDisplay("ScreenCapture",

mSurfaceView.getWidth(), mSurfaceView.getHeight(), mScreenDensity,

DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR,

mSurface, null, null);

mButtonToggle.setText(R.string.stop);

}

private void stopScreenCapture() {

if (mVirtualDisplay == null) {

return;

}

mVirtualDisplay.release();

mVirtualDisplay = null;

mButtonToggle.setText(R.string.start);

}

}