在Android中，如何使用Java添加内部图像？_Android

在Android中，如何使用Java添加内部图像？

android

在Android中，如何使用Java添加内部图像？,android,Android,我在“src\main\res\drawable\gate\u logo.png”中有一个图像，如下所示： LinearLayout Demo_Layout = new LinearLayout(context); Demo_Layout.setId(View.generateViewId()); // Demo_Layout.setBackgroundColor(Color.rgb(88, 188, 218)); Demo_Layout.setBackground

我在“src\main\res\drawable\gate\u logo.png”中有一个图像，如下所示：

    LinearLayout Demo_Layout = new LinearLayout(context);
    Demo_Layout.setId(View.generateViewId());
//    Demo_Layout.setBackgroundColor(Color.rgb(88, 188, 218));
    Demo_Layout.setBackgroundColor(Color.rgb(98, 198, 238));
    Demo_Layout.setHorizontalGravity(Gravity.CENTER);
    Demo_Layout.setVerticalGravity(Gravity.CENTER);
    addView(Demo_Layout, LinearLayout.LayoutParams.MATCH_PARENT,328);

    TextView textView = new TextView(context);
    textView.setId(View.generateViewId());
    textView.setGravity(Gravity.CENTER);
    textView.setTextSize(20);
    textView.setText(Html.fromHtml("<P><Br><big>GATE Demo</big><P>[ Graphic Access Tabular Entry ]<Br><small>An Interception-resistant Authentication System</small>"));
//    Demo_Layout.addView(textView, LinearLayout.LayoutParams.MATCH_PARENT, 328);
//    Demo_Layout.addView(textView, 600, 328);

//    int resID = getResources().getIdentifier("gate_logo.png", "drawable", "package.name");
    int resID = getResources().getIdentifier("gate_logo_s.png", "drawable", context.getPackageName());
    ImageView gateLogoView = new ImageView(context);
    gateLogoView.setImageResource(resID);
//    gateLogoView.setScaleType(ImageView.ScaleType.CENTER_CROP);
//    gateLogoView.setScaleType(ImageView.ScaleType.FIT_XY);
    gateLogoView.setLayoutParams( new ViewGroup.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));

    gateLogoView.setX(1);
    gateLogoView.setY(1);
    LinearLayout.LayoutParams vp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
    gateLogoView.setLayoutParams(vp);
    gateLogoView.setImageResource(resID);

//    Demo_Layout.addView(gateLogoView, 600, 328);
    Demo_Layout.addView(gateLogoView);

    LinearLayout Button_Layout = new LinearLayout(context);
    Button_Layout.setId(View.generateViewId());
    Button_Layout.setBackgroundColor(Color.rgb(168, 98, 188));
    Button_Layout.setHorizontalGravity(Gravity.CENTER);
    Button_Layout.setVerticalGravity(Gravity.CENTER);

    RelativeLayout.LayoutParams lp1 = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, 138);
    lp1.addRule(RelativeLayout.BELOW, Demo_Layout.getId());
    addView(Button_Layout, lp1);

    Button Registration_Button=new Button(context);
    Registration_Button.setText("Registration");
    Registration_Button.setAllCaps(false);
    Registration_Button.setOnClickListener(Registration_Demo_Listener);
    Button_Layout.addView(Registration_Button);

    Button Login_Button=new Button(context);
    Login_Button.setText("Login");
    Login_Button.setAllCaps(false);
    Login_Button.setOnClickListener(Login_Demo_Listener);
    Button_Layout.addView(Login_Button);

    Button Auto_Demo_Button=new Button(context);
    Auto_Demo_Button.setText("Auto Demo");
    Auto_Demo_Button.setAllCaps(false);
    Auto_Demo_Button.setOnClickListener(Auto_Demo_Listener);
    Button_Layout.addView(Auto_Demo_Button);

我的Java代码如下所示：

    LinearLayout Demo_Layout = new LinearLayout(context);
    Demo_Layout.setId(View.generateViewId());
//    Demo_Layout.setBackgroundColor(Color.rgb(88, 188, 218));
    Demo_Layout.setBackgroundColor(Color.rgb(98, 198, 238));
    Demo_Layout.setHorizontalGravity(Gravity.CENTER);
    Demo_Layout.setVerticalGravity(Gravity.CENTER);
    addView(Demo_Layout, LinearLayout.LayoutParams.MATCH_PARENT,328);

    TextView textView = new TextView(context);
    textView.setId(View.generateViewId());
    textView.setGravity(Gravity.CENTER);
    textView.setTextSize(20);
    textView.setText(Html.fromHtml("<P><Br><big>GATE Demo</big><P>[ Graphic Access Tabular Entry ]<Br><small>An Interception-resistant Authentication System</small>"));
//    Demo_Layout.addView(textView, LinearLayout.LayoutParams.MATCH_PARENT, 328);
//    Demo_Layout.addView(textView, 600, 328);

//    int resID = getResources().getIdentifier("gate_logo.png", "drawable", "package.name");
    int resID = getResources().getIdentifier("gate_logo_s.png", "drawable", context.getPackageName());
    ImageView gateLogoView = new ImageView(context);
    gateLogoView.setImageResource(resID);
//    gateLogoView.setScaleType(ImageView.ScaleType.CENTER_CROP);
//    gateLogoView.setScaleType(ImageView.ScaleType.FIT_XY);
    gateLogoView.setLayoutParams( new ViewGroup.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));

    gateLogoView.setX(1);
    gateLogoView.setY(1);
    LinearLayout.LayoutParams vp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
    gateLogoView.setLayoutParams(vp);
    gateLogoView.setImageResource(resID);

//    Demo_Layout.addView(gateLogoView, 600, 328);
    Demo_Layout.addView(gateLogoView);

    LinearLayout Button_Layout = new LinearLayout(context);
    Button_Layout.setId(View.generateViewId());
    Button_Layout.setBackgroundColor(Color.rgb(168, 98, 188));
    Button_Layout.setHorizontalGravity(Gravity.CENTER);
    Button_Layout.setVerticalGravity(Gravity.CENTER);

    RelativeLayout.LayoutParams lp1 = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, 138);
    lp1.addRule(RelativeLayout.BELOW, Demo_Layout.getId());
    addView(Button_Layout, lp1);

    Button Registration_Button=new Button(context);
    Registration_Button.setText("Registration");
    Registration_Button.setAllCaps(false);
    Registration_Button.setOnClickListener(Registration_Demo_Listener);
    Button_Layout.addView(Registration_Button);

    Button Login_Button=new Button(context);
    Login_Button.setText("Login");
    Login_Button.setAllCaps(false);
    Login_Button.setOnClickListener(Login_Demo_Listener);
    Button_Layout.addView(Login_Button);

    Button Auto_Demo_Button=new Button(context);
    Auto_Demo_Button.setText("Auto Demo");
    Auto_Demo_Button.setAllCaps(false);
    Auto_Demo_Button.setOnClickListener(Auto_Demo_Listener);
    Button_Layout.addView(Auto_Demo_Button);

LinearLayout Demo_Layout=新的LinearLayout（上下文）； Demo_Layout.setId（View.generateViewId（））； //Demo_布局.setBackgroundColor（Color.rgb（88188218））； Demo_布局.setBackgroundColor（Color.rgb（98198238））；演示布局。设置水平重力（重心）；演示布局。设置垂直重力（重心）； addView（演示布局，LinearLayout.LayoutParams.MATCH\u父级，328）； TextView TextView=新的TextView（上下文）； setId（View.generateViewId（））； textView.setGravity（Gravity.CENTER）； textView.setTextSize（20）； textView.setText（Html.fromHtml（“ GATE Demo

[Graphic Access Tabular Entry] 一种防拦截的身份验证系统”）； //Demo_Layout.addView（textView，LinearLayout.LayoutParams.MATCH_父项，328）； //Demo_Layout.addView（textView，600328）； //int resID=getResources（）.getIdentifier（“gate_logo.png”、“drawable”、“package.name”）； int resID=getResources（）.getIdentifier（“gate_logo_.png”，“drawable”，context.getPackageName（））； ImageView gateLogoView=新的ImageView（上下文）； gateLogoView.setImageResource（resID）； //gateLogoView.setScaleType（ImageView.ScaleType.CENTER\U裁剪）； //gateLogoView.setScaleType（ImageView.ScaleType.FIT_XY）； gateLogoView.setLayoutParams（新视图组.LayoutParams（LayoutParams.MATCH_父级，LayoutParams.MATCH_父级））； gateLogoView.setX（1）； gateLogoView.setY（1）； LinearLayout.LayoutParams vp=新的LinearLayout.LayoutParams（LayoutParams.WRAP_内容，LayoutParams.WRAP_内容）； gateLogoView.setLayoutParams（vp）； gateLogoView.setImageResource（resID）； //Demo_Layout.addView（gateLogoView，600328）； Demo_Layout.addView（gateLogoView）； LinearLayout按钮\布局=新的LinearLayout（上下文）；按钮_Layout.setId（View.generateViewId（））；按钮布局。设置背景颜色（颜色。rgb（168，98，188））；按钮布局。设置水平重力（重心）；按钮布局。设置垂直重力（重心）； RelativeLayout.LayoutParams lp1=新的RelativeLayout.LayoutParams（LayoutParams.MATCH_父项，138）； lp1.addRule（RelativeLayout.down，Demo_Layout.getId（））； addView（按钮布局，lp1）；按钮注册\按钮=新按钮（上下文）；注册按钮设置文本（“注册”）；注册按钮。设置所有上限（错误）；注册按钮。setOnClickListener（注册演示监听器）；按钮\布局。添加视图（注册\按钮）；按钮登录\按钮=新按钮（上下文）； Login_Button.setText（“登录”）；登录按钮。setAllCaps（false）；登录按钮。setOnClickListener（登录演示监听器）；按钮\布局。添加视图（登录\按钮）；按钮自动演示按钮=新按钮（上下文）；自动演示按钮.setText（“自动演示”）；自动演示按钮。设置所有上限（错误）；自动演示按钮。setOnClickListener（自动演示监听器）；按钮布局。添加视图（自动演示按钮）；

在同一个目录中，我还有一个小一半的图像版本：gate_logo_.png

我尝试过不同的组合，但为什么徽标图像没有显示出来

屏幕截图如下所示：

    LinearLayout Demo_Layout = new LinearLayout(context);
    Demo_Layout.setId(View.generateViewId());
//    Demo_Layout.setBackgroundColor(Color.rgb(88, 188, 218));
    Demo_Layout.setBackgroundColor(Color.rgb(98, 198, 238));
    Demo_Layout.setHorizontalGravity(Gravity.CENTER);
    Demo_Layout.setVerticalGravity(Gravity.CENTER);
    addView(Demo_Layout, LinearLayout.LayoutParams.MATCH_PARENT,328);

    TextView textView = new TextView(context);
    textView.setId(View.generateViewId());
    textView.setGravity(Gravity.CENTER);
    textView.setTextSize(20);
    textView.setText(Html.fromHtml("<P><Br><big>GATE Demo</big><P>[ Graphic Access Tabular Entry ]<Br><small>An Interception-resistant Authentication System</small>"));
//    Demo_Layout.addView(textView, LinearLayout.LayoutParams.MATCH_PARENT, 328);
//    Demo_Layout.addView(textView, 600, 328);

//    int resID = getResources().getIdentifier("gate_logo.png", "drawable", "package.name");
    int resID = getResources().getIdentifier("gate_logo_s.png", "drawable", context.getPackageName());
    ImageView gateLogoView = new ImageView(context);
    gateLogoView.setImageResource(resID);
//    gateLogoView.setScaleType(ImageView.ScaleType.CENTER_CROP);
//    gateLogoView.setScaleType(ImageView.ScaleType.FIT_XY);
    gateLogoView.setLayoutParams( new ViewGroup.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));

    gateLogoView.setX(1);
    gateLogoView.setY(1);
    LinearLayout.LayoutParams vp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
    gateLogoView.setLayoutParams(vp);
    gateLogoView.setImageResource(resID);

//    Demo_Layout.addView(gateLogoView, 600, 328);
    Demo_Layout.addView(gateLogoView);

    LinearLayout Button_Layout = new LinearLayout(context);
    Button_Layout.setId(View.generateViewId());
    Button_Layout.setBackgroundColor(Color.rgb(168, 98, 188));
    Button_Layout.setHorizontalGravity(Gravity.CENTER);
    Button_Layout.setVerticalGravity(Gravity.CENTER);

    RelativeLayout.LayoutParams lp1 = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, 138);
    lp1.addRule(RelativeLayout.BELOW, Demo_Layout.getId());
    addView(Button_Layout, lp1);

    Button Registration_Button=new Button(context);
    Registration_Button.setText("Registration");
    Registration_Button.setAllCaps(false);
    Registration_Button.setOnClickListener(Registration_Demo_Listener);
    Button_Layout.addView(Registration_Button);

    Button Login_Button=new Button(context);
    Login_Button.setText("Login");
    Login_Button.setAllCaps(false);
    Login_Button.setOnClickListener(Login_Demo_Listener);
    Button_Layout.addView(Login_Button);

    Button Auto_Demo_Button=new Button(context);
    Auto_Demo_Button.setText("Auto Demo");
    Auto_Demo_Button.setAllCaps(false);
    Auto_Demo_Button.setOnClickListener(Auto_Demo_Listener);
    Button_Layout.addView(Auto_Demo_Button);

更换这些线路：

int resID = getResources().getIdentifier("gate_logo_s.png", "drawable", context.getPackageName());
ImageView gateLogoView = new ImageView(context);
gateLogoView.setImageResource(resID);

有了这些：

ImageView gateLogoView = new ImageView(context);
gateLogoView.setImageResource(R.drawable.gate_logo);

src/main/res中的图像通常位于assets文件夹中。看看如何加载它们。显示如何访问您的可绘图资源。@Robert

src/main/res/assets

下的资源与

src/main/res/drawable

下的资源不同。