android 获取内存使用率

您好，关于 Android 获取内存使用率的问题，可以通过 ActivityManager 类中的 getMemoryInfo 方法来获取。具体代码如下：

ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
ActivityManager.MemoryInfo memoryInfo = new ActivityManager.MemoryInfo();
activityManager.getMemoryInfo(memoryInfo);
long totalMemory = memoryInfo.totalMem;
long availableMemory = memoryInfo.availMem;
float memoryUsage = (float) (totalMemory - availableMemory) / totalMemory;

其中，totalMemory 表示总内存大小，availableMemory 表示可用内存大小，memoryUsage 表示内存使用率。

相关问题

android 获取gpu内存使用率

要获取Android设备上GPU内存使用率，可以使用以下步骤：

1. 在Android Studio中打开您的应用程序项目。

2. 在项目中添加以下依赖项：

dependencies {
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support:support-annotations:28.0.0'
    implementation 'com.android.support:design:28.0.0'
    implementation 'com.android.support:support-v4:28.0.0'
    implementation 'com.android.support:cardview-v7:28.0.0'
    implementation 'com.android.support:recyclerview-v7:28.0.0'
    implementation 'com.android.support:multidex:1.0.3'
    implementation 'com.google.android.gms:play-services-ads:17.2.0'
    implementation 'com.google.android.gms:play-services-vision:17.0.2'
    implementation 'com.google.android.gms:play-services-location:16.0.0'
    implementation 'com.google.android.gms:play-services-maps:16.0.0'
    implementation 'com.google.android.gms:play-services-auth:16.0.1'
    implementation 'com.google.android.gms:play-services-identity:16.0.0'
    implementation 'com.google.android.gms:play-services-games:16.0.0'
    implementation 'com.google.android.gms:play-services-drive:16.0.0'
    implementation 'com.google.android.gms:play-services-plus:16.0.0'
    implementation 'com.google.android.gms:play-services-panorama:16.0.0'
    implementation 'com.google.android.gms:play-services-nearby:16.0.0'
}

3. 在应用程序中添加以下代码：

private double getGpuUsage() {
    Process process = null;
    double gpuUsage = 0.0d;
    try {
        process = Runtime.getRuntime().exec("dumpsys meminfo");
        BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()), 1024);
        String line;
        int index = -1;
        while ((line = reader.readLine()) != null) {
            if (line.contains("Graphics")) {
                index = line.indexOf(":");
                gpuUsage = Double.parseDouble(line.substring(index + 1, line.length() - 1).trim());
                break;
            }
        }
        reader.close();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (process != null) {
            process.destroy();
        }
    }
    return gpuUsage;
}

4. 调用此方法以获取GPU内存使用率：

double gpuUsage = getGpuUsage();

5. 您可以将此值打印到控制台中，也可以将其发送到您的服务器以进行分析和监控。

android 获取gpu 内存使用率

可以通过使用Android系统提供的OpenGL ES API来获取GPU内存使用率。

1. 首先，在AndroidManifest.xml文件中添加以下权限：

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.GET_TASKS"/>
<uses-permission android:name="android.permission.REAL_GET_TASKS"/>

2. 在代码中，可以使用如下方式获取OpenGL ES的状态信息：

import android.app.ActivityManager;
import android.content.Context;
import android.opengl.GLSurfaceView;
import javax.microedition.khronos.opengles.GL10;

public class OpenGLMonitor implements GLSurfaceView.Renderer {

    private ActivityManager mActivityManager;
    private int mMaxTextureSize;
    private int mMaxTextureUnits;
    private int mMaxVertexAttribs;
    private int mMaxVaryingVectors;
    private int mMaxVertexUniformComponents;
    private int mMaxFragmentUniformComponents;
    private int mMaxVertexTextureImageUnits;
    private int mMaxFragmentTextureImageUnits;
    private int mMaxRenderbufferSize;
    private int mMaxViewportDims;

    public OpenGLMonitor(Context context) {
        mActivityManager = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);
    }

    @Override
    public void onSurfaceCreated(GL10 gl, javax.microedition.khronos.egl.EGLConfig config) {
        mMaxTextureSize = getMaxTextureSize(gl);
        mMaxTextureUnits = getMaxTextureUnits(gl);
        mMaxVertexAttribs = getMaxVertexAttribs(gl);
        mMaxVaryingVectors = getMaxVaryingVectors(gl);
        mMaxVertexUniformComponents = getMaxVertexUniformComponents(gl);
        mMaxFragmentUniformComponents = getMaxFragmentUniformComponents(gl);
        mMaxVertexTextureImageUnits = getMaxVertexTextureImageUnits(gl);
        mMaxFragmentTextureImageUnits = getMaxFragmentTextureImageUnits(gl);
        mMaxRenderbufferSize = getMaxRenderbufferSize(gl);
        mMaxViewportDims = getMaxViewportDims(gl);
    }

    @Override
    public void onSurfaceChanged(GL10 gl, int width, int height) {
    }

    @Override
    public void onDrawFrame(GL10 gl) {
    }

    private int getMaxTextureSize(GL10 gl) {
        int[] params = new int[1];
        gl.glGetIntegerv(GL10.GL_MAX_TEXTURE_SIZE, params, 0);
        return params[0];
    }

    private int getMaxTextureUnits(GL10 gl) {
        int[] params = new int[1];
        gl.glGetIntegerv(GL10.GL_MAX_TEXTURE_UNITS, params, 0);
        return params[0];
    }

    private int getMaxVertexAttribs(GL10 gl) {
        int[] params = new int[1];
        gl.glGetIntegerv(GL10.GL_MAX_VERTEX_ATTRIBS, params, 0);
        return params[0];
    }

    private int getMaxVaryingVectors(GL10 gl) {
        int[] params = new int[1];
        gl.glGetIntegerv(GL10.GL_MAX_VARYING_VECTORS, params, 0);
        return params[0];
    }

    private int getMaxVertexUniformComponents(GL10 gl) {
        int[] params = new int[1];
        gl.glGetIntegerv(GL10.GL_MAX_VERTEX_UNIFORM_COMPONENTS, params, 0);
        return params[0];
    }

    private int getMaxFragmentUniformComponents(GL10 gl) {
        int[] params = new int[1];
        gl.glGetIntegerv(GL10.GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, params, 0);
        return params[0];
    }

    private int getMaxVertexTextureImageUnits(GL10 gl) {
        int[] params = new int[1];
        gl.glGetIntegerv(GL10.GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS, params, 0);
        return params[0];
    }

    private int getMaxFragmentTextureImageUnits(GL10 gl) {
        int[] params = new int[1];
        gl.glGetIntegerv(GL10.GL_MAX_TEXTURE_IMAGE_UNITS, params, 0);
        return params[0];
    }

    private int getMaxRenderbufferSize(GL10 gl) {
        int[] params = new int[1];
        gl.glGetIntegerv(GL10.GL_MAX_RENDERBUFFER_SIZE, params, 0);
        return params[0];
    }

    private int getMaxViewportDims(GL10 gl) {
        int[] params = new int[2];
        gl.glGetIntegerv(GL10.GL_MAX_VIEWPORT_DIMS, params, 0);
        return params[0] * params[1];
    }

    public float getGpuUsage() {
        ActivityManager.MemoryInfo memoryInfo = new ActivityManager.MemoryInfo();
        mActivityManager.getMemoryInfo(memoryInfo);
        long totalMemory = memoryInfo.totalMem;
        long availMemory = memoryInfo.availMem;
        long usedMemory = totalMemory - availMemory;
        float usage = (float) usedMemory / totalMemory;
        return usage;
    }
}

3. 然后，可以在需要获取GPU内存使用率的地方调用getGpuUsage()方法来获取GPU内存使用率。

OpenGLMonitor monitor = new OpenGLMonitor(context);
float gpuUsage = monitor.getGpuUsage();